an electronic system for following someone or something that is moving or being transported in order to find out where they are at a particular time

The company is pouring millions into a track and trace service so that internet companies can keep their customers up to date on the progress of their deliveries. 这家公司向跟踪及追踪服务投入数百万美元，以便互联网公司能够让他们的客户及时了解货物的投递进度。

an electronic system for seeing how a disease is spreading and who is affected by it, and then finding other people who might have been infected

Test, track and trace – TTT – involves testing people for coronavirus, tracking the spread of the virus, then tracing the people an infected person has come into contact with. 测试、跟踪及追踪，缩写为TTT，包括对人们进行冠状病毒的测试、跟踪病毒的传播，然后追踪受感染者接触过的人。

The Government hopes to roll out the test, track, and trace app across the whole of the United Kingdom by the middle of May. 政府希望在5月中旬前在整个英国普及测试、跟踪和追踪应用程序。

Coronavirus: Councils across the north of England are to set up their own track-and-trace systems. 冠状病毒：英格兰北部各地方议会将建立自己的电子跟踪及追踪系统。

to follow, using electronic equipment, someone or something that is moving or being transported in order to find out where they are at a particular time

We'll give you a password and you can track and trace loads via the Internet. 我们会给你密码，你可以在互联网上跟踪和追踪货物。

to discover, using electronic equipment, how a disease is spreading and who is affected by it, and then find other people who might have been infected

The aim of such apps is to allow those who have been in close contact with anyone confirmed to have COVID-19 to be tracked and traced. 这类应用程序的目的是跟踪并追踪与确诊COVID-19患者有过密切接触的人。